ARRESTED! Plies LOCKED UP After Gun Was Found In Carry-On Bag At Airport [VIDEO]

Plies allegedly tried to get away with packing a Glock in his carry-on bag at the airport today, and it landed him in the county jail! Deets on his arrest and his hat-less mugshot inside...

Who is packing these bags for these celebs?! It very well could have been Plies himself, to be honest. The "Ran Off On Da Plug Twice" rapper was jetting out of Tampa this AM when he put his carry on bag - stocked with a gun and a magazine of bullets - through the security scan. Police allege he doesn't have a permit for the weapon.

Either he doesn't know the law in Florida or doesn't care, but either way, his carelessness got him good and arrested. He was charged with carrying a concealed firearm.

Law enforcement sources tell us the rapper was getting a bag scanned Wednesday morning at Tampa International Airport before getting onto a Delta flight when TSA agents discovered a Glock 43 in one of his bags, as well as a fully-loaded magazine lying beside it.

We're told Plies had no permit for the gun, and was arrested by airport police for carrying a concealed weapon -- a felony. We're told he's currently in custody at Tampa International ... and will be transferred to Hillsborough County Jail.

Interestingly, Plies' people have an explanation. And they claim he IS a registered gun owner.

Sources close to Plies tell TMZ he mistakenly grabbed the wrong bag before heading to the airport, and admits the gun is his. We're also told he is a registered gun owner.

Algernod Washington's mugshot and police report are below:

As of 5:30p ET, Plies is still in lock up and has not yet posted his $2,000 bond.